Writing brother dour with money (5)
I believe the answer is:
grimm
'writing brother' is the definition.
The definition suggests a singular noun which matches the answer.
'dour with money' is the wordplay.
'dour' becomes 'grim' (synonyms).
'with' says to put letters next to each other.
'money' becomes 'm' (abbreviation in economics).
'grim'+'m'='GRIMM'
Can you help me to learn more?
(Other definitions for grimm that I've seen before include "Collector of stories" , "Jacob & Wilhelm -, fairy tale collectors" , "Fairy-tale author brothers" , "taletellers" , "writer" .)